No. Yom Kippur is not a federal holiday in the US, so government offices, banks and schools follow their normal schedule unless they choose otherwise.
When is Yom Kippur 1999?
Yom Kippur 1999 falls on Monday, September 20.
Why does the date of Yom Kippur change each year?
It follows the Hebrew calendar, a lunisolar calendar whose months follow the moon. The Gregorian date moves each year but stays within the same season.